> a=10
> b=4
> c=a+b
> a=20
>> Now what is the value of c?
>> For the first example, the answer is pretty clearly 14 but for the
> second the answer could arguably be either 14 *or* 24.
>> I think most programmers are going to go with 14 but I wonder if a
> totally pass by reference language would cause effects that would mean
> that you would get used to it being 24.
Ummm, not unless the value of "c" is actually a representation of the
expression "a + b" that is dynamically re-interpreted each time you read it.
Otherwise, even in a reference-only context, "c" was calculated at assignment
time from the existing values of "a" and "b".
Randy
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Randy J. Ray Silicon Valley Scale Modelers: http://www.svsm.orgrjray at blackperl.comrandy.j.ray at gmail.com